Answer:
Exposition, or the introduction, is just one of a plot's many parts. Exposition sets up the story, including the setting, conflict and characters. This vital part of the plot not only indicates what the story will be about, but also draws the reader into the story.
Explanation:
When Dally tells Johnny how they won the rumble, Johnny mumbles "Useless... fighting's no good..." basically, he doesn't like the idea of fighting.
btw I love this book OMG my fav when I was in 7th grade
hope I helped!